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Thermaltake continues to bring innovative solutions to CPU cooling challenges. The CL-P0552 "Silent 1156" combines multiple features for optimal cooling of high-powered CPUs. True to its name, the 92mm fan of the Silent 1156 has a maximum noise level of 22 dBA at its top speed of 1700 RPM. The translucent fan moves an impressive 36.2CFM of cooling air.

Its stealth-like abilities are further enhanced by PWM control which lets the system monitor the fan's speed and performance and allows the fan to spin slower – and quieter – during periods of low thermal demand. The Silent 1156 easily mounts above the CPU using push pins and the copper base rests directly against the chip to draw away damaging heat. Dual seamlessly soldered heatpipes penetrate the cooling fin array above for optimal heat transfer and dissipation.

The Silent 1156 effectively cools Intel Socket LGA1156 processors including the Core i7, i5 and i3. Make sure it won't freeze your computer when you choose this Thermaltake Silent 1156!

Rating: 3/5Niche target

Pros: This thing is, as advertised, silent. I've had it for just over 2 years and it has never once made any audible noise. This is the only reason to buy this HSF.

Cons: Doesn't cool my system that well at all, it barely cools better than the stock hsf that came with my CPU.

Other Thoughts: I bought this particular HSF because at the time of purchase all the other compatible 1156 socket coolers (very few of them were available, the socket was just released) were out of stock. I've had favorable results with Thermaltake in the past and decided to give this HSF a whirl. It didn't have any reviews at the time, and now I wish I had waited and gotten the HSF I really wanted. I whole heartedly recommend the average person avoiding this HSF. Look around, there are a few high quality and cheap HSF's available around this price range.

Rating: 5/5Excellent cooling for the price

Pros: Definitely cools down the CPU a good 10-15 Celsius compared to the stock cooler that came with my i3 550.

The fan is very quiet during idle to low loads. During high loads the fan is just about as quiet to a little less noisy than the Intel stock cooler was during its peak load.

Highly recommended for someone who wants great cooling compared to their stock cooler.

Installation was very easy. However that could just be me since I do computer repair for a living, lol. I would recommended that you watch a video on how to properly apply the thermal grease as well.

Cons: The only con I can think of it that it's slightly bigger due to the fan size and the fact that it blows air to the side rather than directly up from the cpu. (Of course these directions are relative when you prop the tower up right)

Just make sure that there are no cables that are dangling or could get in the fan.

Other Thoughts: Just make sure you have the room and adequate ability to install something like this and you will be fine. Excellent product, copper on the CPU leading to aluminum fins is the way to go as far as metals are concerned imo.

The only thing is I *don't* overclock, so I have no input on how this would handle for the overclockers out there.

Rating: 2/5Wanted to like it, but

Cons: Though installation was easy, it wasnt solid. The first time I pushed the pins through the motherboard, the whole assembly was VERY crooked. The crookedness could be adjusted by pushing back a little more on THIS pin, then a little more on THAT pin, oops now a little more on ANOTHER pin, etc etc etc. It is impossible to know for certain that the heat sink is flush with the processor unless you take the mobo out and do a visual inspection. But one of the reasons I bought this was to NOT have to take the mobo out. It also did not cool any better than the stock cooler nor was it any quieter. Maybe my stock cooler was "Premium Stock" or something.

Other Thoughts: Perhaps the problems I had with mounting was my fault, the mobo's fault, or both. I have a socket 1155 Gigabyte motherboard.

What makes me think that this fan COULD work for someone is that it worked as well as the stock fan even when it wasnt making good contact with the CPU. Some sort of mechanical doohickey that says "Assembly is perpendicular to motherboard!" is needed.

Rating: 5/5Nice Cooler

Pros: Have used these on a number of i5's and they seem to hold up nicely. Haven't had any yet that are anything but quiet except a couple of seriously overclocked systems and even then nothing major when compared to the other cooling parts in the tower. They really are a decently quiet cooler.

Cons: As usual, have a clue of your MB layout prior to purchasing. This does take up some real estate.

Other Thoughts: If you end up doubling fans on your unit, try to go with matched pairs of the same item/model. Otherwise you may end up creating turbulence and ruining the airflow from one fan running at one rpm and the other at a different rpm. This can actually decrease your cooling ability. This can also create more fan noise too.

Rating: 3/5Too noisy

Cons: Its the noisiest piece of hardware in my otherwise quite silent desktop. It makes more noise than the stock fan I had on my CPU. If you want a silent desktop, this is NOT the cooler to buy. Wish I didn't buy this one.

Rating: 5/510-12°C lower temps!

Pros: It is what it claims to be, quiet and cool. Upgraded to this from the stock Intel heatsink and fan that came with my i5 2500k 3.3GHz. I used the Antec FORMULA 7 Nano Diamond for my thermal compound instead of the tube that came with the cooler.

With all the power saving settings off @ 3.3GHz I'm seeing temps in the upper 20s. They were just under 40°C with the stock intel cooler. OC'd up to 4.2GHz it runs right around 75°C under max load for extended periods and in the upper 30s idle.

Couldn't ask for more for the price. The pushpin design makes for easy installation if you have a case without a cutout behind the chipset. Just make sure the are all seated nice and tight as they can be a bit deceptive if your haven't have much experience with them.

Cons: None so far

Other Thoughts: Like all pushpin designs these could wear out and break if the cooler needs to be reseated too many times. Not really a con as I knew that about pushpins going in and they work well out of the box. Just something to think about for first time buyers.

Pros: This is not for OCing. This is for a standard run system. It's cheap and will hold two fans.

Cons: Don't be dumb like me. Make darned sure you have the fan(s) placed in the direction you want the air to flow. You do not want to fire your box up and realize, "dangit, wrong direction". Don't trust the arrows. Turn the bugger on and actually confirm the direction.

Other Thoughts: I dropped two fans on both sides. Works like a freakin charm.

Rating: 5/5Amazing cooler for the money!

Pros: This is a wonderful cooler. It comes with its own thermal grease (although I still use Arctic Silver), it is easy and intuitive to install and works great. My Intel i5-2500K when under load heavy gaming loads never goes above 45 degrees C, even during Turbo Boost (that Intel auto frequency scaling).

Cons: It may be a little loud for some people, but for me it isn't a problem - I'm too busy gaming to notice any of the fans!

Rating: 5/5Very nice for low cost!

Pros: This fan is exceedingly quiet and runs really cool. The whole thing feels kinda cheap when you get it but honestly it beats out most other high end fans by far. My quad core i5 is OC'd to 4GHz and it runs at 35C at idle at 76F ambient room temp. Seriously that's awesome for a $25 fan. Had it for over a year now and still runs completely silent. Don't be fooled by the low price....honestly I just bought it til I could afford something more high end but a year later and I'm super pleased with this one!

Cons: Kinda big...might cover RAM slots in a microATX board but not sure since I don't have that

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